/Engine/Source/Runtime/Engine/Classes/Animation/Skeleton.h
Get Track index of InAnimSeq for the BoneTreeIndex of BoneTree this is slow, and it's not supposed to be used heavilyIndexof Track of Animation Sequence
int32 GetRawAnimationTrackIndex ( const int32 InSkeletonBoneIndex, const [UAnimSequence](API\Runtime\Engine\Animation\UAnimSequence) * InAnimSeq )